ZCZC NFDSPENES ALL
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HIZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 04/17/08 1555Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-11 1530Z  RUMINSKI
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LOCATION...HAWAII...
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ATTN WFOS...HFO...
ATTN RFCS...AKRFC...
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EVENT...HEAVY RAIN ALONG FRONTAL BAND LAYING ACROSS WESTERN ISLANDS
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SATELLITE ANALYSIS AND TRENDS...LATEST AMSU MICROWAVE PASS FROM 1252Z
THIS MRNG SHOWS AXIS OF HIGHEST PW/S ALIGNED SW/NE ACROSS NIIHAU AND
KAUAI. MAX VALUES IN THE PLUME ARE MAINLY ARND 1.5" WITH ISOLATED 1.8"
JUST SW OF NIIHAU. ANIMATION OF PW/S OVER PAST 12-24 HRS SHOWS SLOW BUT
STEADY PROGRESS TO THE EAST WITH LITTLE OVERALL CHANGE IN MAX VALUES
EMBEDDED IN THE PLUME/FNTL ZONE.
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IR GOES-11 IMAGERY SHOWS NARROW LN OF CNVTN ALG FNT ABOUT 200 KM W OF
KAUAI. THIS CNVTN HAS BEEN BUILDING S PAST FEW HRS AS IT SLOWLY EDGES TO
THE EAST. MORE WDSPRD AREA OF PREFRONTAL SHWRS/THUNDERSTORMS COVERS THE
WRN ISLANDS. LATEST IMAGERY SHOWS THAT THE LN HAS SETTLED JUST S OF THE
ISLANDS IN MORE OF AN E/W OREINTATION AND MAY PROVIDE A GOOD BOUNDARY
FOR ADDITIONAL LIFT LATER TDY. LOW LEVEL CLD FIELD INDICATES GOOD S TO
SE FLOW INTO THIS LN AND BEYOND (INTO THE FNT).
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LARGER PICTURE IN WV LOOP SHOWS 2 FEATURES THAT WILL CONT TO AFFECT
HI. MODEST VORT NEAR 25N160W HAS BEEN TRACKING SLOWLY TO THE E AND
DRAGGING THE FNT AND PW PLUME WITH IT. HOWEVER..IT APPEARS TO BE GETTING
ABSORBED BY LARGER VORT NOW NEAR 40N170W. THIS FEATURE IS DRIFTING TO THE
SW AND IT DOES NOT LOOK LIKE IT WILL BE PICKED UP BY POLAR JET/FNTL ZONE
NOW APCHG THE DATELINE..BUT RATHER LOOKS LIKE IT MAY BECOME CUTOFF FOR
A TIME WITH UPR RIDGE BUILDING OVER IT TO THE N. WITH CONTD SW DRIFT IN
THE SHORT TERM THIS WILL LIKELY DIMINISH EWRD PUSH TO FNT OVER THE WRN
ISLANDS. THEREFORE..EXPECT THAT FNT WILL ONLY LITTLE ADDITIONAL PUSH TO
THE EAST IN THE SHORT TERM (0-6 HRS) WITH POSSIBLE RETROGRESSION BEYOND
THAT (12-24 HR TIMEFRAME). THIS WILL LEAVE KAUAI AND NIIHAU WITH THREAT
OF HEAVY RAIN FOR AT LEAST THE NEXT DAYS OR SO.
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SEE NCEP HPC DISCUSSION AND QPF/S FOR FORECAST.
....NESDIS IS A MEMBER OF 12 PLANET....
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SSD/SAB WEB ADDRESS FOR PRECIP ESTIMATES:
HTTP://WWW.SSD.NOAA.GOV/PS/PCPN/
...ALL LOWER CASE EXCEPT /PS/PCPN/
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LAT...LON 2294 16091 2288 15806 2096 15806 2114 16114
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